and Systems Engineering
Dr. Sudarsanam Suresh Babu,
UT/ORNL Governor's Chair Professor for Advanced Manufacturing,
University of Tennessee
Friday, October 4, 2013
John D. Tickle Engineering Building
"Characterization and Modeling of Materials Processed by Additive Manufacturing"
Hybrid structures, made with metals, polymers, ceramics, glasses and elastomers in specific geometrical forms, are being considered as innovative solutions for energy applications. In their collaborative research, Babu and colleagues focus on both solid-state and fusion-based additive processes to make these hybrid structures.
In the first part of the talk, an overview of on-going research related to additive manufacturing will be discussed. The importance of interdisciplinary research involving characterization and modeling will be highlighted. In the second part of the talk, adoption of integrated process modeling to describe microstructure evolution in laser additive manufacturing (LAM) will be presented.
Recent work demonstrates that during LAM, irrespective of alloy chemistry, builds do exhibit spatial heterogeneity of hardness. This is related to complex microstructure evolution brought about by repeated heating and cooling of substrate and pre-existing builds. In order to predict these microstructures, efforts are underway to couple the process model) developed by Applied Optimization with overall transformation kinetic models for wide range of materials, including titanium, nickel and iron alloys.
Preliminary research shows that by using these models, improved fatigue properties can be achieved by engineering the microstructures.
Dr. Sudarsanam Suresh Babu is the Governor's Chair Professor for Advanced Manufacturing based in the Department of Mechanical, Aerospace, and Biomedical Engineering at UT and has a joint professorship with the Department of Materials Science and Engineering. He also has an appointment in the Energy and Environmental Sciences Directorate and in the Advanced Manufacturing Program at Oak Ridge National Laboratory (ORNL).
Babu, a former professor in the Department of Materials Science and Engineering at The Ohio State University (OSU), directed a National Science Foundation Industry and University Cooperative Research center centered on materials joining for energy applications. He received his bachelor of engineering in metallurgy from P.S.G. College of Technology, Coimbatore, India, his master of technology in industrial metallurgy-welding from the Indian Institute of Technology, Madras, Chennai, India, and his doctoral degree in materials science from the University of Cambridge.
Babu’s work has been career-focused on both basic and applied research areas pertaining to structural metals, materials, and processing, which are applicable to the fundamental challenges in bringing additive manufacturing (3D printing) and other advanced manufacturing concepts further into broader production use.